Smooth muscle “microsphincters” in the gastric mucosa of stingrays (Elasmobranchii, Dasyatidae)
- 1 February 2023
- journal article
- research article
- Published by Wiley in Journal of Fish Biology
- Vol. 102 (4), 992-995
- https://doi.org/10.1111/jfb.15328
Abstract
The occurrence of smooth muscle sphincters around gastric gland tubules in the cardiac stomach of some elasmobranch species is reported for the first time. These "microsphincters" took the form of a twisted torus, approximately 12-16 muscle fibres thick, that could fully constrict the gland tubules. However, their inconsistent positioning does not suggest a role in partitioning the tubules from the stomach lumen or in modulating secretory activity. Further research is required to ascertain the full taxonomic occurrence of these structures across the Elasmobranchii and to elucidate their function.Keywords
Funding Information
- United Arab Emirates University (G00003006)
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